// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef MEDIA_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_
#define MEDIA_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_

#include <vector>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/threading/thread_checker.h"
#include "media/cast/logging/raw_event_subscriber.h"

namespace media {
namespace cast {

    // RawEventSubscriber implementation that records all incoming raw events
    // in std::vector's.
    // The user of this class can call the GetXXXEventsAndReset functions to get
    // list of events that have acccumulated since last inovcation.
    class SimpleEventSubscriber : public RawEventSubscriber {
    public:
        SimpleEventSubscriber();

        ~SimpleEventSubscriber() final;

        // RawEventSubscriber implementations.
        void OnReceiveFrameEvent(const FrameEvent& frame_event) final;
        void OnReceivePacketEvent(const PacketEvent& packet_event) final;

        // Assigns frame events received so far to |frame_events| and clears them
        // from this object.
        void GetFrameEventsAndReset(std::vector<FrameEvent>* frame_events);

        // Assigns packet events received so far to |packet_events| and clears them
        // from this object.
        void GetPacketEventsAndReset(std::vector<PacketEvent>* packet_events);

    private:
        std::vector<FrameEvent> frame_events_;
        std::vector<PacketEvent> packet_events_;

        // All functions must be called on the main thread.
        base::ThreadChecker thread_checker_;

        DISALLOW_COPY_AND_ASSIGN(SimpleEventSubscriber);
    };

} // namespace cast
} // namespace media

#endif // MEDIA_CAST_LOGGING_SIMPLE_EVENT_SUBSCRIBER_H_
